What is the "usual" lap time around THill on a small bike? At least from the AFM race results, it seems like the 300 is capable of running a 2:04-2:12 for racers (from latest AFM results there).
I would agree that the 400 should be a bit faster than the 300, but I would expect it to be about 3 seconds or so for the same rider on the same day.
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